This application implements a simple backend for a Tic Tac Toe game using Google Cloud Endpoints, App Engine, and Java.

• Google App Engine 1.8.8 1

• Java 1.7 2

• Google Cloud Endpoints
• [Google App Engine Maven plugin][6]

a. Update the value of application in appengine-web.xml to the app ID you have registered in the App Engine admin console and would like to use to host your instance of this sample. b. Update the values in src/com/google/devrel/samples/ttt/spi/Ids.java to reflect the respective client IDs you have registered in the APIs Console.

c. Update the value of google.devrel.samples.ttt.CLIENT_ID in war/js/render.js to reflect the web client ID you have registered in the

Need a separate link to guide the user through the setup process. Non trivial.

d. mvn clean install e. Run the application with mvn appengine:devserver, and ensure it's running by visiting your local server's address (by default [localhost:8080][5].)

And I see a page with a large yellow triangle, with a caption stating "You must sign in to play". So I press "Sign in" at the top left, then get an error in the next popup page. Is this expected behaviour ?

The error is:

Error: invalid_client Bad request. Request Details cookie_policy_enforce=false response_type=code token id_token gsession scope=https://www.googleapis.com/auth/userinfo.email https://www.googleapis.com/auth/plus.login redirect_uri=postmessage cookie_policy=single_host_origin proxy=oauth2relay646919858 include_granted_scopes=true origin=http://localhost:8080 state=305326422|0.3899307157 client_id=itaxibookperf request_visible_actions=http://schemas.google.com/AddActivity authuser=0

e. Get the client library with mvn appengine:get_client_lib f. Deploy your application.

NOT https [5]: http://localhost:8080/ [6]: https://developers.google.com/appengine/docs/java/tools/maven